Printing envelopes on OKI C9850

[jimbras]

Hello everyone,

I am currently trying to print some laser safe envelopes (with window) in my Oki c9850.
Unfortunately the printed envelopes present some Show-through.
Does anyone has any advice for avoiding this situation?

Thanking in advance for all your helpful advice's.

Regards,

Nuno

 

[Al Ferrari]

By "Show-through" do you mean the image appears on the other side of the envelope?

That would mean the toner has migrated across 2 or more layers of paper. Do you believe that?

Al

 

[jimbras]

By "Show-through" do you mean the image appears on the other side of the envelope?

That would mean the toner has migrated across 2 or more layers of paper. Do you believe that?

Al

By show-through I mean that the envelope seams become marked and become visible through the envelope.
Oki aproaches this situation on a okidata document (page 8):

http://my.okidata.com/oki-faq.nsf/c9faf8f06c13edf3852567b9006a2942/c6f9e7d22095a9c5852577c40065d494/$FILE/Envelope%20Printing%20Guide_8_11.pdf

Unfortunatly even with this guide I did not overcome this situation.

Thank you for all your help,

Nuno

 

[Al Ferrari]

Nuno,

The correct terminology in the printing trade for that effect is embossing. In this case it is unwanted and is caused by the squeeze of the stock where there are changes in the number of layers, and of course does not involve color or pigment at all.

"Show through" is a very poor choice of words on Okidata's part and reflects their only recent involvement in the trade.

Al

[Edit]: The problem can also occur in the printing of envelopes by offset, but there it can be combated by having a very thin "blanket" adhered to the impression cylinder, so that the envelope is squeezed between two flexible surfaces. To learn more about this solution, search on line for "equal impression blanket." But I don't think it lends itself to the problem on the Oki printers.

 

[jimbras]

Nuno,

The correct terminology in the printing trade for that effect is embossing. In this case it is unwanted and is caused by the squeeze of the stock where there are changes in the number of layers, and of course does not involve color or pigment at all.

"Show through" is a very poor choice of words on Okidata's part and reflects their only recent involvement in the trade.

Al

[Edit]: The problem can also occur in the printing of envelopes by offset, but there it can be combated by having a very thin "blanket" adhered to the impression cylinder, so that the envelope is squeezed between two flexible surfaces. To learn more about this solution, search on line for "equal impression blanket." But I don't think it lends itself to the problem on the Oki printers.

Al,

Thank for clarifying the terminology.
This is probably the reason why I did not found any significant information on this subject!
I will do some searching and see what I get.
I will also try to find if your offset solution can be, in any way, applied to my printer.

Thank you for all your help

Nuno

 

[narseman]

I also use an Oki envelope printer. Overall I like the modular aspect of the printer, but I also have the issue of unintended embossing. Since it is toner / laser and the toner needs to be fused to the paper, I don't how one could ever overcome the problem. I have noticed color changes too on the multi layer surfaces. The problem seems worse when using heavier paper settings and heavy toner coverage. Depending on the needs of your jobs, perhaps try econo toner mode, but certainly flatten all images before trying to print.. We tell the client, this is how it is, and most are ok with it. The alternative is to go with an ink jet system.

 

[Possumgal]

I have the same problem. We were told to use a heavier paper setting, which would open up the rollers a bit and relieve some pressure, but it didn't help a bit. Those special digital window envelopes seem to be pretty flimsy to me. We are just living with the embossing.

 

[Craig]

It is what it is with the Oki platform. The fuser will smash the envelope causing the embossed look. Changing the paper settings typically does nothing but slow the paper travel through the fuser, thus allowing it to better fuse the toner. Look at the fuser I bet there is no motor to open and close the roller pressure, just springs to maintain the same pressure.

The new Ricoh platform does not emboss the envelopes, I think the only one using it is Xante with the Impressia printer. Just had one installed a few weeks ago. Half the cost on the consumables and faster print speed. The only thing is the feeder is a bit hokey until you get used to it.